Posted by Cary Meyers on Sunday, 30 January 2011, at 9:27 a.m., in response to Re: Frozen hammer/tumbler, posted by Dick Hosmer on Tuesday, 25 January 2011, at 12:57 a.m.

Thanks for the wonderful replies! I did get the hammer off the tumbler finally by using a punch as described and setting the lockplate on a large enough socket to accomodate the tumbler. I then carefully cleaned the corrosion off the tumbler and hammer fittings. I also acquired a replacement hammer screw which is perfect.